campagman said:
According to the manual I should be able to get 230 pics min. from a couple of rechargeable Ni-mh batteries. I bought 4 batteries and a charger with the camera so should be able to get plenty of pics between charges.
In a pinch you can put in standard alkalines too, I guess, so you shouldn't be stuck.
I am now more concerned about bright sunlight making the screen useless for composing shots. Having the option of a viewfinder would be useful.
I've been less than impressed with the optical viewfinders on digital compacts myself - I have an Agfa Isolette, a folding, medium format camera from the 1950's, that has a better viewfinder than the one on my powershot

I found with mine (powershot) I could usually shade the screen enough with my hand to make it usable (may not be an option if you want to shoot one handed though). You could always try some with optical viewfinders and see whether you think they're worthwhile or not.
When the guy sold me the camera he made a big thing about lens stabilisation, which this camera has and the powershot does not. He said that all the good and more expensive cameras have this and so should be something I should be looking for. Is this a very useful feature to look for?
Depends what you intend to do with the camera.
Image stabilisation compensates for involuntary movements of the hands whilst shooting at low shutter speeds. The old rule of thumb was to shoot at the inverse of your focal length, so a 50mm lens would be shot at 1/50 of a second or faster, a 100mm lens at 1/100 of a second or faster. The lower the speed, the more likely that you get blurry pictures because of your hands not being quite steady.
Image stabilisation is one approach to the problem of shooting in low-ish light (the other being to boost high ISO performance, allowing shutter speeds fast enough to not be affected by camera shake).
The image stabilisation approach is great for static subjects, but anything moving when you shoot at 1/30s, or 1/2s (for example) will be blurred in the frame. To freeze motion you need higher shutter speeds, and so might prefer a camera that allows those by giving good high ISO performance, depending on what conditions you think you'll be using the camera in.